Ionic wind pumps have considerable potential for flow control, heat transfer, and drying applications due to their advantages of low energy consumption, compact structure, flexible design, and lack of moving parts. However, a high flow rate ionic wind pump with large cross-sectional for cooling high thermal power electronic devices requires further research. In this study, a two-stage ionic wind pump with needle-to-mesh electrodes was developed for cooling electronics. Experimental systems were established to test the flow and heat transfer characteristics. The effects of needle electrodes’ arrangement, mesh electrodes’ structure, needle tip-to-mesh gap, and stage distance on the output velocity and power consumption of ionic wind pumps were investigated. The influence of the arrangement of an ionic wind pump and heat sink on the cooling performance was also studied. Two groups of interactive mechanisms, interference between neighboring needles and needle density, the discharge effect and the resistance effect of mesh electrodes, affected the flow characteristics. A grid size with an optimal value of 4 mm was obtained by combining the discharge and resistance effects. As the needle tip-to-mesh gap increased, the velocity at the same applied voltage decreased but the velocity limit near the breakdown voltage increased. Counter discharge between the stages induced additional power consumption. As the stage distance increased, the breakdown shifted from between two stages to within each stage. The counter discharge disappeared as the stage distance increased to greater than 29 mm. At the ionic wind pump’s optimum parameters, the output velocity of 3.91m/s was achieved. And the cooling experiment indicated that the optimized ionic wind pump can reduced the surface temperature of a 200W power heat source by more than 30℃. The present study provides guidance for heat dissipation designs for maintenance-free electronics in remote areas.

离子风泵具有能耗低，结构紧凑，设计灵活以及缺少活动部件的优点，因此在流量控制，传热和干燥应用方面具有巨大潜力。然而，用于冷却高热功率电子设备的具有大横截面的高流量离子风泵需要进一步的研究。在这项研究中，开发了带有针到网状电极的两级离子风泵，用于冷却电子设备。建立了实验系统以测试流动和传热特性。研究了针电极的布置，网状电极的结构，针尖到网之间的间隙以及工作台距离对离子风泵输出速度和功耗的影响。还研究了离子风泵和散热器的布置对冷却性能的影响。两组相互作用机制是相邻针之间的干扰和针密度，网状电极的放电效应和电阻效应，影响了流动特性。通过结合放电和电阻效应获得了最佳值为4 mm的栅格尺寸。随着针尖到网间隙的增加，在相同施加电压下的速度降低，但击穿电压附近的速度极限增加。两级之间的反向放电引起额外的功耗。随着载物台距离的增加，击穿从两个载物台之间转移到每个载物台内。当载物台距离增加到大于29 mm时，反向放电消失。在离子风泵的最佳参数下，输出速度为3.91m / s。冷却实验表明，优化的离子风泵可使200W功率热源的表面温度降低30℃以上。本研究为偏远地区的免维护电子产品的散热设计提供了指导。